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Salary
$140k – $200k per year
Location
Hybrid (Devens, United States)
Seniority
Senior · 7+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 20, 2026. First seen by Alion on Aug 20, 2026. Commonwealth Fusion Systems scores A on the Alion truth index.

Overview
Company
Impact
Profile match
Commonwealth Fusion Systems is a commercial fusion energy company headquartered in Devens, Massachusetts, and founded in 2018. The firm specializes in the development of high-temperature superconducting magnets and compact tokamak devices, specifically the SPARC net-energy machine and the ARC commercial power plant. It operates through a strategic partnership with the Massachusetts Institute of Technology and focuses on scaling fusion technology to provide carbon-free, baseload power to global energy markets.

Join the power movement as a Senior Data and Operations Software Engineer

The Software Engineering team is seeking an experienced and motivated backend software engineer to become a member of the Data and Operations Software group. The group is responsible for the company’s data services and as a backend software engineer you will play a crucial role in developing the APIs and distributed systems that facilitate data acquisition, access, and processing capabilities within the company. You will work closely with physicists and other software engineers to create robust and high-performance data systems tailored to the unique needs of our groundbreaking work in the field of fusion energy.

What you'll do:

  • Develop the distributed systems and services that provide data acquisition, access, and processing capabilities within the company
  • Write clean, maintainable, and efficient code in Golang
  • Write a user-friendly Python client library
  • Collaborate with physicists, diagnosticians, and other engineers to gather user stories and translate the resulting requirements into code
  • Optimize backend performance to improve data ingestion, retrieval, and processing times
  • Help make fusion energy a reality by making it possible to collect, retrieve, and analyze data from simulations and experiments

What we’re looking for:

  • Bachelor's degree in a relevant engineering field (computer science, computer engineering, electrical engineering, industrial engineering, etc.)
  • 7+ years relevant experience
  • Proven experience as a backend software engineer working on distributed systems and REST APIs
  • Strong problem-solving skills and attention to detail
  • Excellent communication and teamwork skills
  • Ability to work in a fast-paced, collaborative, and innovative environment
  • Proficiency with Python
  • Proficiency with Go (Golang) or similar language that is suitable for web services
  • Familiarity with Linux and development tools such as Git, GitHub, and Docker

Bonus points for:

    • Experience in developing software for mission-critical applications
    • Experience with real-time data collection and visualization
    • Experience with very large volume data collection
    • Some familiarity with front-end frameworks such as React

Must-have Requirements:

  • Perform activities such as typing, standing, sitting, etc. for extended periods of time
  • Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics
  • Willingness to occasionally travel or work required nights/weekends/on-call
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